*NO RESPONSE FROM PCM (POWERTRAIN CONTROL MODULE)
For a complete wiring diagram Refer to Section 8W.
| Possible Causes |
| (A209) FUSED B(+) CIRCUIT OPEN OR SHORTED |
| (Z130) (Z816) GROUND CIRCUIT OPEN |
| (F26) (F942) FUSED IGNITION SW OUTPUT CIRCUIT OPEN OR SHORTED |
| (D65) CAN C BUS (+) CIRCUIT OPEN |
| (D64) CAN C BUS (-) CIRCUIT OPEN |
| POWERTRAIN CONTROL MODULE |
Diagnostic Test
1. TEST FOR INTERMITTENT CONDITIONTurn the ignition on.
NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.
With the scan tool, select ECU view.
NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.
NOTE: Check the FCM for any active CAN C hardware DTCs, perform DTC before proceeding.
Does the scan tool display a red X next to the module?
Yes
- Go To 2
No
- The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
2. (A209) FUSED B(+) CIRCUIT OPEN OR SHORTED
Turn the ignition off.
Disconnect the PCM C1 harness connector.
CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.
Using a 12-volt test light connected to ground, check the (A209) Fused B(+) circuit.
Does the test light illuminate brightly?
Yes
- Go To 3
No
- Repair the (A209) Fused B(+) circuit for an open or short.
- Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5.
3. (Z130) (Z816) GROUND CIRCUIT OPEN
Using a 12-volt test light connected to 12-volts, check each (Z816) and (Z130) ground circuit.
Does the test light illuminate brightly for each circuit?
Yes
- Go To 4
No
- Repair the ground circuit for an open.
- Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5.
4. (F26) (F942) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN OR SHORTED
Turn the ignition on.
Using a 12-volt test light connected to ground, check each (F26) and (F942) Fused Ignition Switch Output circuit.
NOTE: It may be necessary to turn the ignition to the start position to properly check the F26 circuit.
Does the test light illuminate brightly for each circuit?
Yes
- Go To 5
No
- Repair the Fused Ignition Switch Output circuit for an open or short.
- Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5.
5. (D65) CAN C BUS (+) CIRCUIT OPEN
Turn the ignition off.
Disconnect the FCM C1 harness connector.
Measure the resistance of the (D65) CAN C Bus (+) circuit between the FCM connector and the appropriate terminal of the special tool #8815.
Is the resistance below 5.0 ohms?
Yes
- Go To 6
No
- Repair the (D65) CAN C Bus (+) circuit for an open.
- Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5.
6. (D64) CAN C BUS (-) CIRCUIT OPEN
Measure the resistance of the (D64) CAN C Bus (-) circuit between the FCM connector and the appropriate terminal of the special tool #8815.
Is the resistance below 5.0 ohms?
Yes
- Replace and program the Powertrain Control Module in accordance with the service information.
- Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5.
No
- Repair the (D64) CAN C Bus (-) circuit for an open.
- Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5.